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Senior – HV Overhead Transmission Lines

Role Overview

We are seeking an experienced Overhead Line (OHL) Engineer – High Voltage Transmission to join our growing Transmission & Distribution team, supporting major transmission infrastructure and energy transition projects.

In this role, you will contribute to the design and delivery of overhead transmission line systems, typically ranging from 110kV to 400kV+, supporting projects from feasibility and concept development through detailed design and construction support.

You will work as part of multidisciplinary teams delivering grid reinforcement and renewable integration projects for Transmission System Operators, utilities, and infrastructure developers.

Key Responsibilities

1. Transmission Line Design

• Design and engineer HV/EHV overhead transmission lines (typically 110kV–400kV+).

• Develop and review deliverables including route alignments, tower spotting, conductor and earth wire selection, and insulator configurations.

• Define clearances, right-of-way requirements, and design criteria in accordance with applicable standards.

• Provide technical input to tower loading calculations and structural design teams.

• Develop and review PLS-CADD models and transmission line layouts.

2. Transmission Line Calculations and Technical Studies

Perform key electrical and mechanical transmission line calculations, including:

Electrical studies

• Conductor ampacity

• Corona and radio interference

• Electric field analysis

• Line impedance and shielding performance

Mechanical studies

• Sag–tension calculations

• Conductor blowout

• Loading cases (wind, ice, temperature)

• Clearance verification

Structural interface

• Tower loading trees and load combinations

• Coordination with structural teams for tower and foundation design.

Engineering analysis is typically performed using PLS-CADD and PLS-TOWER (or equivalent tools).

3. Project Engineering and Multidisciplinary Coordination

• Contribute to engineering delivery of overhead line projects across multiple project phases.

• Coordinate with structural, geotechnical, power systems, and environmental teams.

• Support feasibility studies, route corridor assessments, and technical evaluations.

• Provide technical input to engineering deliverables, proposals, and project documentation.

4. Standards, Compliance and Quality

• Ensure designs comply with relevant standards including IEC, IEEE, EN/British Standards and National Grid / DNO specifications.

• Participate in design reviews, technical verification, and internal QA processes.

5. Construction and Site Support

Provide technical support during construction and installation, including:

• Tower erection and foundation works

• Conductor stringing operations

• Resolution of site technical issues and design adjustments

6. Technical Documentation

Prepare and review engineering documentation including:

• Transmission line design reports and calculation notes

• Tower spotting reports and sag–tension charts

• Technical specifications, BoQs, and construction drawings

Documentation supports design reviews, client approvals, and project audits.

Qualifications & Experience

Education

• Bachelor’s degree in Electrical, Civil, or Structural Engineering

Experience

• Typically 5–8 years of experience in overhead transmission line engineering

• Experience working on HV transmission line projects (110kV – 400kV+)

• Experience performing PLS-CADD modelling and sag–tension calculations

Technical Skills

• Strong understanding of:

  • Transmission line electrical principles

  • Mechanical behaviour of conductors and structures

  • Clearance and safety requirements

  • Transmission line routing and tower spotting

• Experience with:

  • PLS-CADD

  • PLS-TOWER / PLS-POLE

Nice to Have

• Experience working on UK transmission or distribution projects

• Exposure to National Grid standards and technical specifications

• Experience on EHV transmission line projects (400kV+)

• Chartered Engineer (CEng) or working towards chartership

• Experience supporting construction or site engineering activities

At AECOM, you will have freedom to grow in a world of opportunity

Our Freedom to Grow hybrid working philosophy is the cornerstone of our success as a business – supporting a culture of flexibility, trust and performance at AECOM.

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About AECOM 

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan. 

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2025. Learn more at aecom.com. 

What makes AECOM a great place to work 

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you’ll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you’ve always envisioned. Here, you’ll find a welcoming workplace built on respect, collaboration and community - where you have the freedom to grow in a world of opportunity. 

As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines.